*{
	/* 消除所有元素内外边距 */
	margin:0px;
	padding:0px;
}
#a img {
    display: block;
    margin: 0 auto;
}
#c{
	text-align: center;
}
#e{
	text-align:left;
}

#d{
		display: block;
		background-color: blue;
		height: 300px;
		width: auto;
		text-align: center;
		color: aliceblue;
	}

#l{
	text-align: center;
	margin: auto;
	width: 50%;
	border: 3px solid green;
	padding: 10px;
}

#f{
	text-align: center;
	margin: auto;
	width: 50%;
	border: 3px solid green;
	padding: 10px;
}
#g{
		text-align: center;
		margin: auto;
		width: 50%;
		border: 3px solid green;
		padding: 10px;

	}
#g p{
		font-size:100%;
	}
	#d a{
		text-decoration: none;
		color: darkorange;
	}
	#d ul{
		list-style-type:none;
		margin:1.25rem;
		padding:1.25rem;
	}
	#d li{
	display:inline;
	}